CVE-2026-8368

LWP::UserAgent versions before 6.83 for Perl leak Authorization and Proxy-Authorization headers on cross-origin redirects. On a 3xx response, the redirect handler strips only Host and Cookie before issuing the follow-up request. Caller-supplied Authorization and Proxy-Authorization headers are sent unchanged to the redirect target, including across scheme, host, or port changes. A redirect to an attacker controlled host therefore discloses the caller's credentials to that host.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/libwww-perl/libwww-perl/commit/9c4aeb6f2dd32f2b7eaf2d7827cade31ea6cb2c6.patch
https://github.com/libwww-perl/libwww-perl/pull/284
https://github.com/libwww-perl/libwww-perl/pull/512
https://metacpan.org/release/OALDERS/libwww-perl-6.83/changes
http://www.openwall.com/lists/oss-security/2026/05/12/7

Configurations

No configuration.

History

No history.

Information

Published : 2026-05-12 15:16

Updated : 2026-06-17 11:03

NVD link : CVE-2026-8368

Mitre link : CVE-2026-8368

CVE.ORG link : CVE-2026-8368

JSON object : View

Products Affected

No product.

CWE

CWE-522

Insufficiently Protected Credentials

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